Check valve



Jan; 29, 19395. R H. HUMMER-T 1,989,199 CHECK VALVE Filed oct. so,v 1933.

a I7 j? 26 20 I3 Z 25 A 22 ,f '2/ l a5- 2a 4 l l ,w 't 24 10 ,94; A TTOR/VE Y 7PM [NI/ENTOR/ Patented Jan. 29, 1935 Robert /llufrnmeraV ayton,

om; rsigner 'of y' The S. H. Thomson Mamufacturing'jcompany,l .j

vDayizonQOnhio', a corporation of Ohio Application october so, 1933,' seria1NoLS5a4 (i, y

" s claims; ci. asi-#ren This invention relates to new'anduseful im-v provements in check valves. v It is one of the principal objects of my invention to provide a'check valve with' av resilient and renewable seat to eliminate the noise incident to valves having elements with a metal to metal contact, and at the same time providing for the check valve a seat which will yieldingly engage it.

It is another important objectof my'invention to provide a renewable-resilient seat thatmay be removed and renewed without the use of reseating tools. i

Another object of my invention is to provide a freely mounted cage for a. valve such as a check ball in combination with a yieldable resilient seat to eliminate unequal wear on the outlet side of the cage and to promote a true seating of the valve. Y

When a check valve of this type is employed in installations using, for instance, hydrated lime soda ash for the treatment of water, the clogging of the cage and the formation of incrustations on the seat are obviated by the yieldable nature of the latter and the oscillations of the freely mounted cage.

Check valves subject to heavy incrustations will not corrode or cake under the conditions provided by my invention. However, when the valve seat and cage finally become worn, they can be easily and economically replaced without removing the Valve body.

Other important and incidental objects of my invention will be brought out in the following specification and claims annexed thereto.

In the accompanying drawing illustrating my invention in its preferred form, Figure 1 is a longitudinal sectional view taken through the check valve. Figure 2 is an end View of the outlet end of the Valve. And Figure 3 is a perspective view of the freely mounted cage.

Referring now to the drawing for a detailed description of my invention, the numeral 1 designates a check valve body having a center cylindrical cage-receiving boss 2. On each side 'of the latter are oppositely disposed hexagonal bosses 3 and 4 provided with threaded inlet and outlet apertures 5 and 6 respectively. (See Figures 1 and 2.)

Extending transversely of the valve body 1 is a seat supporting wall '1, providing between it and the bottom wall 8 of the body an inlet passage 9 that communicates with the inlet aperture 5. Above the wall 'l the boss 2 defines a'vertical,

cylindrical housing v10 communicating at .one

side thereofrwiththe outlet aperture 6. (See Figuresland 2.3* f fl lathe-wall'- 7.,.. concentric. with thel housing 10, is a circular valve port 11 having ati-its cen-l ter, between the top and bottom faces of thewall, an under-eut, .concentric A:feat-receiving recess 12. Thetop face. `1370i the latter -is slightlyinclined toward the port opening' x11 .aindlreceives therein a removable, resilient, flanged circular seat 14 of semiehar'd .rubber kor similar seat14, by virtuefof its exiblity, may be easily inserted in orv 'removed.from, .its support, a circumferential flangeflthereunbeing received by thei'recess; 12.. "il-he face of ythe sea-'n.14l projects;

material. The lo:

slightly above the wall 7, where it is further sup- 15 ported by the surrounding wall of a counterbore 16 slightly larger than the port opening 1,1.

The top open end of the housing 1 0 in the boss 2 is threaded, being concentric with the port 11 and closed'by a hexagon shoulder 18 and an inner threaded shoulder 19 screwed into the housing 10. Between the cap 1'7 and valve body is a gasket 17e.

The inner face of the cap 1'1 is recessed, and

flanged cap l'l-having an outer 2Q is provided with an undercut annular groove 20. 25

Between the latter and the face of the shoulder 19, the recess is defined by a beveled shoulder 21. The beveled shoulder 21 facilitates the assembly of a valve cage 22 with the cap 17. This cage 22 is formed of four circumferentially spaced, ax- 30 ial rods 23 held in spaced relation by an enclosing ring 24 to which they are welded or brazed, adjacent their lower ends. As shown at Figures 1 .and 3, the upper free ends of the rods 23 are formed inwardly to limit the upward travelof a 35 check ball 25, positioned within the cage 22, and then the ends 26 are formed outwardly at right angles to their lower ends. The rods 23, when secured to the ring 24, are yieldable at their outer free ends; and when pressed against the beveled 4o shoulder 21 of the cap 17, these free ends 26 will yield suiciently to enter the groove 20 in which they are retained by their spring tension. (See Figures 1 and 3.)

When the check valve is in service, the fluid enters the valve body 1 through the inlet opening 5, the passage 9 and the valve port 11, and is discharged through the outlet opening 6. (See Figures 1 and 2.)

When fluid passes through the valve, the check ball 25 will be lifted thereby from its resilient seat 14 into the cage 22. When themovement of the fluid ceases, theA ball 25 will drop back by gravity, against its resilient seat 14.

The weight of the check ball 25 will not only 55 eiectively seal the opening between it and tis seat 14, but the impact of the ball with the resilient seat will also break up and loosen incrustations that may form upon the latter.

When the ball 25 is lifted, its upward travel is limited by the constricted space between the rods 23, as indicated by the dotted line position of the all. i

and vibration of the present ,'f` Y tact of the valve elementsusually fluid compressors.

structure, a yieldable tight seal between the latter and the c heck ball.

Also with this y,valvesa'at As previously set forth, the oscillating cage and renewable seat. provide ,a .self ,.c1eaning,' leak-proof check valve whose elements which are subject toy wear, may be quickly 'renewedlwithout thei use vof reseating tools;,1-. -1 1 f I do not wishto b e limitedtosthe details of conscribed, andany changes V,or alterations may be made therein within the: scope ofthe subjoined claims. a -L v, .et

v Having describedmy invention, I claim:

1. In: a .devicex 'ofjthe` type-described, a' valve body havingy an inletepassage and an outlet passage, a .wall separating said passages' and having a port` threin,1. the-,Wall or saidlvalve .body definbody having an seat isprovided, assuring a ing said port being formed with an annular groove, a removable, resilient anged valve seat supported in said groove, a removable cap for said valve body, having a recess therein, a shoulder in said recessed cap, a cage loosely supported by said shoulder for an oscillatory movement, and valve seat by thev incoming fluid.

of the type described, a. valve inlet passage and an outlet pas- 2. In a device 

